| Acronym | Meaning |
| NRA | National Rivers Authority (UK) |
| SBZ | Surface Brillouin Zone |
| SEAC | Surface-enhanced Affinity Capture |
| TLEED | Tensor Low-energy Electron Diffraction |
| UAQI | Uniform Air Quality Index |
| IMDG | International Maritime Dangerous Goods |
| TLM | Triple Layer Model (of Adsorption) |
| AQTAD | Air-Quality Technical Assistance Demonstration |
| CRHF | Complex-restricted Hartree-Fock |
| SPC | Statistical Process Control |